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GB1317253A - Hydraulic dampers - Google Patents

Hydraulic dampers

Info

Publication number
GB1317253A
GB1317253A GB1317253DA GB1317253A GB 1317253 A GB1317253 A GB 1317253A GB 1317253D A GB1317253D A GB 1317253DA GB 1317253 A GB1317253 A GB 1317253A
Authority
GB
United Kingdom
Prior art keywords
piston
reservoir
spring
passage
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MITCHELL HYDRAULICS Ltd
Original Assignee
MITCHELL HYDRAULICS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MITCHELL HYDRAULICS Ltd filed Critical MITCHELL HYDRAULICS Ltd
Publication of GB1317253A publication Critical patent/GB1317253A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/20—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with the piston-rod extending through both ends of the cylinder, e.g. constant-volume dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

1317253 Hydraulic shock-absorbers MITCHELL HYDRAULICS Ltd 15 July 1970 [15 April 1969] 19267/69 Heading F2S An hydraulic piston-cylinder shock-absorber, particularly for use in pipe-supporting systems, allows free movement under slowly changing forces (e.g. thermal expansion) but becomes substantially rigid under shock loading in either direction. This effect is achieved by fitting, within an axial passage 56 in the piston 50, a pair of spring-loaded valves 68 each of which is urged by a respective spring 66 away from a valve seating 60 in the passage 56. Both valves are normally open, but the leading one closes if the piston is subjected to shock loading. The valve elements 62 each have an axial bleed passage (not shown) and the gap between them communicates with a second through-piston passage 80 containing a pair of overload relief valves constituted by two balls 84 acted on by a spring 86 disposed between them. The cylinder communicates via a valve 90 with a reservoir 92 which is maintained under pressure by a spring- loaded piston 102. The reservoir has a filling valve 96 and the rod 108 of the reservoir piston has a graduated extension 110 to indicate the state of filling. The latter may alternatively be signalled electrically. A dummy piston rod 17 is fitted to the end of the piston opposite the load-carrying piston rod 16, to equalize the loaded area of the two piston faces. The external reservoir shown may be replaced by one located inside the dummy piston rod. Both the cylinder and the piston rod 16 have "spade-type" end connectors 10.
GB1317253D 1969-04-15 1969-04-15 Hydraulic dampers Expired GB1317253A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1926769 1969-04-15

Publications (1)

Publication Number Publication Date
GB1317253A true GB1317253A (en) 1973-05-16

Family

ID=10126543

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1317253D Expired GB1317253A (en) 1969-04-15 1969-04-15 Hydraulic dampers

Country Status (1)

Country Link
GB (1) GB1317253A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2408771A1 (en) * 1977-11-10 1979-06-08 Quiri & Cie Usines SELF-LOCKING CUSHIONING KIT
EP0013227A1 (en) * 1978-12-29 1980-07-09 Messier-Hispano-Bugatti (S.A) Hydraulic damping device for a load subject to shocks and vibrations
US4474271A (en) * 1981-05-20 1984-10-02 Stabilus Gmbh Shock absorber unit
GB2150259A (en) * 1983-10-19 1985-06-26 Pipe Supports Ltd Hydraulic shock arrestor for pipes; valves
FR2566496A1 (en) * 1984-06-21 1985-12-27 Saab Scania Ab DEVICE FOR DAMPING SPEED CHANGES IN TRANSMISSIONS
GB2300840B (en) * 1995-05-18 1999-05-26 Louis Karmios Improvements in or relating to vehicle suspension systems
CN109083968A (en) * 2018-10-30 2018-12-25 江苏容大减震科技股份有限公司 A kind of high speed and large stroke damper of suitable blasting impact environment
CN112879480A (en) * 2021-03-18 2021-06-01 普力莱(苏州)智能科技有限公司 Hydraulic damping type bidirectional fixed speed controller
EP4077963A4 (en) * 2019-12-19 2024-01-10 ROM Acquisition Corporation Hydraulic damper

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2408771A1 (en) * 1977-11-10 1979-06-08 Quiri & Cie Usines SELF-LOCKING CUSHIONING KIT
EP0013227A1 (en) * 1978-12-29 1980-07-09 Messier-Hispano-Bugatti (S.A) Hydraulic damping device for a load subject to shocks and vibrations
FR2445469A1 (en) * 1978-12-29 1980-07-25 Messier Hispano Sa HYDRAULIC BRAKING DEVICE FOR LOAD SUBJECT TO SHOCK AND VIBRATION
US4474271A (en) * 1981-05-20 1984-10-02 Stabilus Gmbh Shock absorber unit
AT391530B (en) * 1981-05-20 1990-10-25 Stabilus Gmbh SHOCK ABSORBER UNIT
GB2150259A (en) * 1983-10-19 1985-06-26 Pipe Supports Ltd Hydraulic shock arrestor for pipes; valves
FR2566496A1 (en) * 1984-06-21 1985-12-27 Saab Scania Ab DEVICE FOR DAMPING SPEED CHANGES IN TRANSMISSIONS
GB2300840B (en) * 1995-05-18 1999-05-26 Louis Karmios Improvements in or relating to vehicle suspension systems
CN109083968A (en) * 2018-10-30 2018-12-25 江苏容大减震科技股份有限公司 A kind of high speed and large stroke damper of suitable blasting impact environment
EP4077963A4 (en) * 2019-12-19 2024-01-10 ROM Acquisition Corporation Hydraulic damper
CN112879480A (en) * 2021-03-18 2021-06-01 普力莱(苏州)智能科技有限公司 Hydraulic damping type bidirectional fixed speed controller
CN112879480B (en) * 2021-03-18 2024-05-28 普力莱(苏州)智能科技有限公司 Hydraulic damping type bidirectional fixed speed controller

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee